Haseeb A.

I help founders launch SaaS MVPs, finish stalled apps, and add AI features to existing products. Get full-stack development, from Next.js/React screens and backend APIs to payments, testing and deployment, in one clearly scoped engagement. Top Rated Plus | $90K+ earned on Upwork I'm Haseeb Asif, a full-stack developer and technical lead at FuzionDev. Choose the package that matches where your product is today. 1. SAAS MVP LAUNCH For founders who need a working first version of a SaaS product, customer portal, dashboard or business web application. Your package can combine: - MVP scope, core user journeys and development milestones - Responsive React/Next.js frontend, Node.js backend and database - Authentication, user roles and the agreed admin tools - Stripe payments or subscriptions and required API integrations - Testing of the agreed workflows, deployment and source-code handover Deliverable: an MVP with a defined feature list and acceptance criteria, plus setup documentation. AI-powered SaaS features can be included when they serve the product's core use case. 2. APP RESCUE & LAUNCH For an existing React or Next.js application with unfinished features, bugs or release blockers. Start with a codebase assessment and prioritized repair plan. The implementation milestone can cover agreed authentication, Supabase/PostgreSQL, API, payment or deployment issues, followed by testing and a documented handover. Started in Lovable, Bolt or Replit? Share the current app and blockers so I can assess the codebase and confirm what can be completed. Deliverable: the agreed fixes or completed workflows, verification notes and a release checklist. Larger rebuilds are scoped separately. 3. AI FEATURE & WORKFLOW INTEGRATION For businesses that want an AI chatbot or a useful AI feature inside an existing web application. We define one workflow and its expected output, then combine the OpenAI/API integration, backend logic, application interface and testing. The scope can include third-party data connections, permissions, validation, error handling and usage limits. Deliverable: an integrated feature with agreed test cases and setup documentation. We establish its data access and human-review requirements before implementation. RELEVANT WORK - Nolltid: ongoing SaaS development and maintenance with Next.js, Firebase, Fortnox integrations and workflow updates. - Vendraw: procurement and vendor management SaaS work with Next.js, Node.js, NestJS and PostgreSQL. - Collab Portal: research collaboration web application development, AI integration and Next.js maintenance. - Fintech loan recommendation app: Next.js, Node.js and PostgreSQL application with an OpenAI chatbot. ONE TECHNICAL LEAD, A CLEAR DELIVERY PLAN I lead technical planning, development and client communication. When a project needs additional FuzionDev specialists, we agree on their roles and the Upwork contracting arrangement before work starts. Each package becomes a written scope with deliverables, milestones, pricing and a realistic schedule. You can start with a focused assessment before committing to a larger build. Ongoing maintenance and feature development are available through a separately agreed backlog. Core stack: Next.js, React, TypeScript, JavaScript, Node.js, PostgreSQL, Supabase, Firebase, Stripe and OpenAI API. Send me your product brief or existing app, the main outcome you need and your target release date. I'll recommend the right package and a practical first milestone.